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Suction/Injection Effects on Pulsating Poiseuille Basic Gaseous Fluctuating-Micro-Flows 吸入/喷射对脉动泊泽维尔碱性气体波动微流动的影响
Pub Date : 2022-04-24 DOI: 10.57233/ijsgs.v5i4.311
A. Sani, H. Jibril
The pulsating Poiseuille fluctuating-micro-flow where the fluid flow is initiated by sinusoidal pressure gradient is investigated in this study. The flow problem is modelled and the analytical solution is obtained. The effect of suction/injection and that of other leading flow parameters such as the frequency of the fluctuating driving force, the Knudsen number and the unsteadiness are analyzed. It is found from the study that the effect of suction and that of injection are observed to be opposite; suction leads to increase while injection leads to decrease in velocity of the moving fluid.
本文研究了由正弦压力梯度引起的脉动波塞维尔波动微流。对流动问题进行了建模,得到了解析解。分析了吸力/喷射以及脉动驱动力频率、克努森数和非定常等主导流动参数的影响。研究发现,抽吸与注射的效果相反;吸入导致运动流体的速度增大,而注入导致运动流体的速度减小。
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引用次数: 0
Application of Queuing Theory in a University Clinic 排队论在某高校门诊的应用
Pub Date : 2022-03-21 DOI: 10.57233/ijsgs.v8i1.338
Aliyu Usman Moyi, Kabir Bello Gamagiwa, Olayemi Joshua Ibidoja, Garba Muhammad
Institutions such as banks, airlines, hospitals and telecommunication industries employ queuing theory to help in assisting the capacity levels needed to experience demand in a more optimized way for service improvement. In this article, we studied and employed the queuing theory activities of the Federal University Gusau Health Services Clinic. The distributions of patients’ arrival and service times were identified. The system was treated as a single, time-independent arrival with multiple service points. Based on the data obtained on the arrival and service processes, appropriate distributions were fitted and tested using the Chi-squared goodness of fit-test.
银行、航空公司、医院和电讯行业等机构采用排队理论,协助提高所需的容量水平,以更优化的方式满足需求,从而改善服务。在本文中,我们研究并运用了联邦大学Gusau卫生服务诊所的排队理论活动。确定了患者到达和服务时间的分布。该系统被视为具有多个服务点的单一、时间无关的到达。根据到达和服务过程的数据,拟合合适的分布,并使用卡方拟合优度检验。
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引用次数: 1
Investigation of Layer Thickness and Groundwater Potentials in Federal University Gusau and Its Environs, Zamfara State, Nigeria 尼日利亚扎姆法拉州联邦大学古索及其周边地区地层厚度和地下水潜力调查
Pub Date : 2022-03-16 DOI: 10.57233/ijsgs.v8i1.318
Shaibu, I., Ovwasa, M.O., Abdullahi M
The groundwater potential and layer thickness were investigated using vertical electrical sounding (VES) method. A total number of 40 vertical electrical sounding VES points were used for the investigation using Schlumberger array and data obtained were analyzed using curve matching and computer iteration techniques. The data revealed a 3-layer (A, KA and H Curve type) and 4-layer (A and H-curve type). In the 3-layer system, the apparent resistivity of the first layer ranged from 18.90 Ωm to 183.20 Ωm with a corresponding thickness of 0.7 m to 14.8 m. The second layer has apparent resistivity value ranged from 13.50 Ωm to 423.80 Ωm with a corresponding thickness in the range of 4.5 m to 14.7 m while the third layer has resistivity values ranging from 1156.40Ωm to 3732.70 Ωm with an infinite depth. For the four (4) layered model curves, first layer’s resistivity ranged from 29.50 Ωm to 244.70 Ωm, with a corresponding thickness ranging from 0.8 m to 13.0 m. The resistivity of the second layers ranged between 25.2 Ωm to 183.4 Ωm with a corresponding thickness ranging from 8.0 m to 14.2 m. The third layer resistivity ranged from 119.4 Ωm to 586.7 Ωm with a corresponding thickness ranging from 8.1 m to 20.4 m. The forth layer has a resistivity value ranging from 1318.3 Ωm to 3240.9 Ωm with an infinite depth. An integration of both isopach and iso-resistivity maps for both the 3- layer model curves and 4- layer model curves indicates that most of the northwest parts of the study area have low apparent resistivity values and thick overburden while, the southern portion has a little higher resistivity values and shallow overburden, an indication of poor groundwater potential. Future boreholes in the area should reached an expected depth of 50 m to 70 m depth
利用垂直电测深法对地下水位和地层厚度进行了研究。利用斯伦贝谢阵列共使用40个垂直电测深VES点进行调查,并使用曲线匹配和计算机迭代技术对获得的数据进行分析。数据显示为3层(a、KA、H曲线型)和4层(a、H曲线型)。在3层体系中,第一层视电阻率为18.90 Ωm ~ 183.20 Ωm,对应厚度为0.7 m ~ 14.8 m。第二层视电阻率值为13.50 Ωm ~ 423.80 Ωm,对应厚度为4.5 m ~ 14.7 m;第三层视电阻率值为1156.40Ωm ~ 3732.70 Ωm,对应深度无限大。4层模型曲线中,第一层电阻率范围为29.50 Ωm ~ 244.70 Ωm,对应厚度范围为0.8 m ~ 13.0 m;第二层电阻率范围为25.2 Ωm ~ 183.4 Ωm,厚度范围为8.0 ~ 14.2 m。第三层电阻率范围为119.4 Ωm ~ 586.7 Ωm,对应厚度范围为8.1 m ~ 20.4 m。第四层电阻率值为1318.3 Ωm ~ 32400.9 Ωm,深度无限。3层模型曲线和4层模型曲线的等电阻率和等电阻率综合图显示,研究区西北部大部分地区视电阻率较低,覆盖层较厚,而南部地区视电阻率略高,覆盖层较浅,地下水潜力较差。该地区未来钻孔的预期深度应为50米至70米
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引用次数: 0
Assessment of Phytochemicals, Antioxidant and Antimicrobial Activities of Aqueous Ethanol Extract and Fractions of Azadirachta indica Stem Bark Azadirachta indica 茎皮乙醇水提取物和馏分的植物化学物质、抗氧化和抗菌活性评估
Pub Date : 2021-12-31 DOI: 10.57233/ijsgs.v9i1.401
F. Adaramola, S. Adewole, Oluwaseun Adewole
In this study, the aqueous ethanol extract of Azadirachta indica stem bark was obtained by Soxhlet extraction and partitioned into different solvents. The extract and fractions were then assessed for their phytochemical contents, antioxidant, and antimicrobial activities. The results showed that saponins, flavonoids, phenol, and tannins were present in all the samples. Also, the ethanol extract had the highest flavonoid (281.15 mgQE/g), phenolic (714.82 mgGAE/g), and tannin (156.54 mgTAE/g) contents, as well as the highest DPPH scavenging activity (95.71%) and total reducing power (1.27). However, among the fractions, butanol fraction showed the highest contents of flavonoids (235.20 mgQE/g), phenolics (413.42 mgGAE/g) and the highest DPPH scavenging activity (93.87 %) while the highest tannin content (86.90 mgTAE/g) and total reducing power (1.06) was observed in the ethyl acetate fraction. The lowest concentration of flavonoid (34.60 mgQE/g) and lowest antioxidant activity was obtained for the hexane fraction while lowest contents of phenolics (102.32 mgGAE/g) and tannins (41.21 mgTAE/g) were both observed in the water-soluble fraction. The most active fraction against both Staphylococcus aureus and Enterobacter cloacae was ethyl acetate. Meanwhile, the ethanol extract, hexane fraction, and water-soluble fractions showed the highest activity against Candida albicans, Salmonella typhi, and Escherichia coli, respectively. This research reveals that the stem bark of Azadirachta indica contains notable antioxidant and antimicrobial properties, making it a promising source for developing potent therapeutic drugs and functional foods.
本研究采用索氏提取法得到印楝茎皮的乙醇水提物,并将其分成不同的溶剂。然后评估提取物和馏分的植物化学成分、抗氧化和抗菌活性。结果表明,所有样品中均含有皂苷、黄酮类化合物、酚和单宁。乙醇提取物类黄酮(281.15 mgQE/g)、酚类(714.82 mgQE/g)和单宁(156.54 mgTAE/g)含量最高,对DPPH的清除能力为95.71%,总还原力为1.27。其中,丁醇部位黄酮类化合物含量最高(235.20 mgQE/g),酚类物质含量最高(413.42 mgQE/g),清除DPPH活性最高(93.87%),乙酸乙酯部位单宁含量最高(86.90 mgTAE/g),总还原力最高(1.06)。正己烷部分黄酮类化合物含量最低(34.60 mgQE/g),抗氧化活性最低,水溶性部分酚类物质含量最低(102.32 mgQE/g),单宁含量最低(41.21 mgQE/g)。对金黄色葡萄球菌和阴沟肠杆菌活性最强的部位是乙酸乙酯。乙醇萃取部位、己烷萃取部位和水溶性萃取部位对白色念珠菌、伤寒沙门氏菌和大肠杆菌的抑菌活性最高。研究表明,印楝茎皮具有显著的抗氧化和抗菌特性,是开发强效治疗药物和功能食品的重要原料。
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引用次数: 0
Application of Linear Programming Technique for Optimal Production in Profit Maximization 线性规划技术在利润最大化中的应用
Pub Date : 2021-11-30 DOI: 10.57233/ijsgs.v7i3.16
Aliyu, U. M.
In this paper, we are concerned with applying linear programming technique to determine optimum product mix of Gusau Sweet Factory Limited to maximize profit. Data on the quantity of major raw materials used in the production of the three different sweets: Toffee. Lollipop and Candy, cost and selling prices and the profit of each product were collected from the extract of the financial record of the company. The problem was formulated as a linear programming problem (LPP) and solved using the revised simplex algorithm. The results show that Toffee and lollipop should be produced daily for the company to realize an optimum profit.
本文研究了如何运用线性规划技术确定姑索糖厂的最佳产品结构,以实现利润最大化。生产三种不同糖果所用主要原料的数量数据:太妃糖。棒棒糖和糖果,成本和销售价格以及每种产品的利润都是从公司财务记录的摘录中收集的。将该问题表述为线性规划问题(LPP),并采用改进的单纯形算法求解。结果表明,要使公司实现最优利润,太妃糖和棒棒糖应该每天生产。
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引用次数: 0
Role of Hydrogen in n-Hexane Hydroisomerisation as a Model Reaction for Gasoline Quality Valorization 氢在正己烷加氢异构化反应中作为汽油质量增值的模型反应的作用
Pub Date : 2021-07-26 DOI: 10.57233/ijsgs.v7i2.22
Galadima, A., Muhammad, R., Almustapha, M. N., Abubakar, M.
Consequent to the current global environmental legislations that enforced the phase-out of dangerous fuel additives with associated pollution problems, other research alternatives for improving fuels quality are investigated. Previously, lead and oxygenates have posed emission dangers that accounted for their complete phase-out in many regions. The emergence of hydroisomerisation as an option presents an opportunity for improving gasoline octane features while eliminating the environmental dangers. We prepared and characterized a noble and cheap catalyst based on β-Mo2C/sulfated zirconia that completely upgraded n-hexane into mono- and di-branched isomers at milder reaction conditions (1 atm, 400oC). The catalyst was 100% selective to n-hexanes at high hydrogen flow rates and recyclable and stable. This way, cheap opportunity for gasoline feed valorization via the hydroisomerisation process became possible.
由于目前的全球环境立法强制淘汰具有相关污染问题的危险燃料添加剂,因此对改善燃料质量的其他研究替代方案进行了研究。此前,铅和含氧化合物造成了排放危险,导致许多地区完全淘汰了它们。氢异构化的出现为改善汽油辛烷值特性提供了机会,同时消除了环境危害。我们制备了一种基于β-Mo2C/硫酸氧化锆的催化剂,并对其进行了表征,该催化剂在较温和的反应条件下(1大气压,400℃)将正己烷完全转化为单支和双支异构体。该催化剂在高氢流量下对正己烷具有100%的选择性,且可回收、稳定。这样,通过加氢异构化过程使汽油进料增值的廉价机会成为可能。
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引用次数: 0
Biochemical Analysis of zingiber officinale rosc (ginger rhizome) and Physicochemical Evaluation of its Oil 姜根茎的生化分析及其油的理化评价
Pub Date : 2021-04-27 DOI: 10.57233/ijsgs.v7i1.50
Alaekwe, I.O., Bashir, B.
Biochemical and physicochemical analysis of ginger rhizome and its oil were respectively carried out to ascertain its health benefits. The mineral composition of the oil was determined using XRF. The active constituent in the oil was determined using GC-MS spectrophotometer, SHIMADZU GCMS-QP 2010 plus model. The metabolites present in the rhizome are alkaloids, tannins, saponins, flavonoids, glycosides, saponin, and steroids. Characterization of the oil showed 194.58mg/g, 123.35mg/g, 286.58mg/g, and 56.67meq/kg of acid, iodine, saponification and peroxide values respectively. The X-ray fluorescence (XRF) analysis showed the presence of Phosphorous, Silicon, Sulphur, Chloride, Calcium, Tita
对生姜及其油分别进行了生化分析和理化分析,以确定其保健功效。用XRF测定了油的矿物组成。采用GC-MS分光光度计,SHIMADZU GCMS-QP 2010 plus模型测定油中有效成分。根茎中存在的代谢物有生物碱、单宁、皂苷、黄酮类、糖苷、皂苷和类固醇。表征油的酸、碘、皂化和过氧化值分别为194.58mg/g、123.35mg/g、286.58mg/g和56.67meq/kg。x射线荧光(XRF)分析显示存在磷,硅,硫,氯化物,钙,钛
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引用次数: 0
Evaluation of Proximate Compositions of Some Edible Insects in Zaria Kaduna State Nigeria 尼日利亚卡杜纳州一些食用昆虫的近似组成评价
Pub Date : 2021-04-27 DOI: 10.57233/ijsgs.v7i1.45
Muinat, M. I., Tariq, A. M.
The present study was carried out to evaluate the proximate compositions of some edible insects in Zaria. Five edible insects were sampled for this study, Crickets (Branchytropes memberanacoeus), Dung beetles (Helicropris angulifera), Termites (Macrotermes nigeriensis), small Grasshopper (Zonocerus variegatus) and large Grasshopper (Kraussaria angulifera). Cricket species were recorded to have the highest value for moisture (4.18%) and Ash (11.62%). Big grasshopperhad the highest value for Carbohydrate (34.08%). Termites had the highest percentage of crude protein (58.99%) and crude fiber (7.09%). Proximate composition values obtained for edible insects sampled for this work were all significant(P<0.05) except for Crude Protein. It is therefore recommended that more Termites (Macrotermes nigeriensis) should be consumed for protein and crude fat (lipid) derivation. The lipids content recorded for termites in this work were higher than those of Chicken (1.5%) and Fish (2.7-5.0%).
本研究对扎里亚一些食用昆虫的近似组成进行了评价。本研究以蟋蟀(Branchytropes memberanacoeus)、金龟子(Helicropris angulifera)、白蚁(Macrotermes nigeriensis)、小蚱蜢(Zonocerus variegatus)和大蚱蜢(Kraussaria angulifera) 5种可食昆虫为研究对象。蟋蟀种类的水分和灰分最高,分别为4.18%和11.62%。大蚱蜢的碳水化合物含量最高(34.08%)。白蚁的粗蛋白质和粗纤维含量最高,分别为58.99%和7.09%。除粗蛋白质外,各食用昆虫的近似组成值均显著(P<0.05)。因此,建议食用更多的白蚁(Macrotermes nigeriensis)来获取蛋白质和粗脂肪(脂质)。白蚁的脂质含量高于鸡(1.5%)和鱼(2.7 ~ 5.0%)。
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引用次数: 0
Malaria Knowledge, Attitude, Perception and Practices in Gusau Metropolis, Zamfara State (A Preliminary Report II) 扎姆法拉州古苏市疟疾知识、态度、认知和实践(初步报告II)
Pub Date : 2021-01-24 DOI: 10.57233/ijsgs.v6i4.57
Abdullahi, K., Shinkafi, S. A., Aguh, B. I., Bilbis, L. S., Danladi, A., Mohammad, B. A., Mohammad, A., Owodunni, B. M, Ahmed, A., Singh, R.
Malaria knowledge, attitude, perception and practices (KAPP) of patients who attended the Microbiology Laboratories of Ahmad Yariman Bakura Specialist Hospital and Federal Medical Centre of Gusau, Zamfara State, Nigeria, between January to December, 2017 was studied. One thousand, one hundred and one (1101) participants (consisted of 428(38.87%) females and 673(61.13%) males) participated and a structured questionnaire was used. The knowledge of the participants about malaria parasites, mosquito vector, signs, symptoms, diagnosis, treatment, prevention and control was remarkable. Majority 796(72.3%) had positive attitude towards malaria infection and in seeking treatment. The perception on malaria (in relation to causes, symptoms, vector, diagnosis and treatment) of the respondents was impressive and this was however guided the positive attitude. The practices of the respondents on malaria diagnosis, treatment, control and prevention varies from individual to individual with majority 655(59.49%) using doctor’s prescription, 601(54.49%) using the artemisinin-based combination therapy (ACT). Both adults and children slept under mosquito net with majority 745(67.67%) using insecticide residual sprays both indoor and outdoor.
研究了2017年1月至12月期间在尼日利亚扎姆法拉州Ahmad Yariman Bakura专科医院微生物实验室和Gusau联邦医疗中心就诊的患者的疟疾知识、态度、认知和实践(KAPP)。采用结构化问卷调查,共1101人(女性428人,占38.87%),男性673人(占61.13%)。与会者对疟疾寄生虫、病媒、体征、症状、诊断、治疗、预防和控制的认识显著提高。796人(72.3%)对疟疾感染和就医持积极态度。答复者对疟疾(在病因、症状、病媒、诊断和治疗方面)的认识令人印象深刻,但这引导了积极的态度。答复者在疟疾诊断、治疗、控制和预防方面的做法因人而异,大多数655人(59.49%)使用医生处方,601人(54.49%)使用以青蒿素为基础的联合疗法。成人和儿童均在蚊帐内睡觉,大多数745人(67.67%)在室内和室外使用杀虫剂残留喷雾剂。
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引用次数: 0
Awareness of Climate Change and its Dangers among Local Farmers of Katsina State, Nigeria 尼日利亚卡齐纳州当地农民对气候变化及其危险的认识
Pub Date : 2020-10-08 DOI: 10.57233/ijsgs.v6i3.75
Galadima, A., Moyi, S. I., Lawal, A. M.
Campaign for climate change awareness, mitigation and adaptation is inevitably a global strategy for consideration. Therefore, investigations on the level of farmers’ commitment in this direction will be very helpful in terms of policy design and implementation. This study therefore targeted farmers in Katsina state as respondents. Five hundred (i.e.500) farmers across five (5) local government areas of the study state (i.e. Katsina state) were targeted and interacted with for the purpose of this investigation by administering pre-designed and eco-evaluated questionnaires. The results showed that most of the farmers have poor prior knowledge of the situation. However, those with good knowledge of climate change are applying fundamental adaptation and mitigation strategies to elevate their agricultural outputs. We are recommending an intensified government campaign towards situation awareness and effective policy design.
提高对气候变化的认识、减缓和适应运动不可避免地是一项需要考虑的全球战略。因此,调查农民在这方面的承诺水平将对政策的设计和实施非常有帮助。因此,这项研究以卡齐纳州的农民为调查对象。通过管理预先设计和生态评估的问卷,研究州(即卡齐纳州)五(5)个地方政府区域的500(即500)名农民成为调查对象,并与他们进行互动。结果表明,大多数农民对形势的先验知识较差。然而,那些对气候变化有良好了解的国家正在运用基本的适应和缓解战略来提高其农业产出。我们建议政府加强对形势的认识和有效的政策设计。
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引用次数: 0
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International Journal of Science for Global Sustainability
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